Onions, not if you have the flux capacitor! ;D
Starting today I'll protect myself so well that my future self won't be able to kill me. Maybe I should kill my future self to rid my problem all together. I'll see who's smarter me or my future self, in the race to build the flux capacitor.
Once I succeed, I will travel to the future, kill my future self, then, haha, I'm smarter than that, travel back in time and kill my past self so as I live into the future my past self, who becomes present, won't live to invent the flux capacitor and come after me.
That's the plan :